There's an (incomplete) comparison here https://github.com/AmitMY/grids and an "awesome" list here: https://github.com/FancyGrid/awesome-grid

After having worked with DataTables, ag-Grid and having evaluated a couple of others I'd say that ag-Grid Enterprise is the best general purpose grid library at the moment.

Only for the use case where you really need exactly some kind of Excel look-alike/Excel web viewer, Handsontable Pro or SpreadJS will probably be better for you, as ag-Grid does not really offer a finished solution here and also misses a couple of minor features at the moment.